22507986 has 16 divisors (see below), whose sum is σ = 45147744. Its totient is φ = 7480704.

The previous prime is 22507981. The next prime is 22508009. The reversal of 22507986 is 68970522.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22507981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3196 + ... + 7431.

It is an arithmetic number, because the mean of its divisors is an integer number (2821734).

Almost surely, 2^22507986 is an apocalyptic number.

22507986 is an abundant number, since it is smaller than the sum of its proper divisors (22639758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22507986 is a wasteful number, since it uses less digits than its factorization.

22507986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10985.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 22507986 is about 4744.2582138834. The cubic root of 22507986 is about 282.3442052189.

The spelling of 22507986 in words is "twenty-two million, five hundred seven thousand, nine hundred eighty-six".